yes i totally feel you on the clear air tubes i stay on that. I am using hydroton aswell, but it just seems like the drip ring could be too big?? the rockwool is super dry geesh getting kinda scared for these seedling.. /
okay i will do that most deff. Would me having the top of the rockwool exposed and using panda cover be the problem u think? Cause i started using the covers after the greenish slim stuff started popping up on hydroton n drip-ring.. /
Grime and salt builds up at the bottom of the airtube if you don't flush. Happened to me my last 2 grows. Usually happens in the final flush. Flush every two weeks with clearex or other flush solution and it won't happen again. Flushing waterfarm 8 packs suck but its worth it. If you treat waterfarms good, they will do the same for you. Peace.